The aim of this research is to provide a schiff base complex as an adsorbent for cadmium, lead and mercury remediation from water solution by flame atomic adsorption spectrometric. The [Fe 2 L 3 Cl(OH 2 )] complex derived from vanillin Schiff base ligand were synthesized and characterized by FT – IR, UV – Vis, CHN, 1 HNMR, TGA, ICP, XRD and FE - SEM. The adsorption heavy metals properties by this complex were investigated. The adsorption study of the complex demonstrated excellent affinity toward Cd(II) at optimum pH of 7, Pb(II) at pH of 5 and Hg(II) at pH of 4.5. A study of the Cd(II), Pb(II) and Hg(II) adsorption kinetics led to the determination of pseudo-second order and the equilibrium isotherms data fitted well by the Langmuir equation with R 2 0.9. Then, thermodynamic parameters such as change in Gi free energy (?G°), enthalpy (?H°) and entropy (?S°) were determined. Finally, 0.05 M of HCl eluent was effective for desorption of adsorbed-Cd/Pb/Hg. Re-adsorption studies demonstrated that this adsorbent could be recovered efficiently for the re-adsorption of the metal ions, and metals could be highly concentrated for recycling.